JPH0564230A - Magnetic video recording and reproducing device - Google Patents

Magnetic video recording and reproducing device

Info

Publication number
JPH0564230A
JPH0564230A JP3219549A JP21954991A JPH0564230A JP H0564230 A JPH0564230 A JP H0564230A JP 3219549 A JP3219549 A JP 3219549A JP 21954991 A JP21954991 A JP 21954991A JP H0564230 A JPH0564230 A JP H0564230A
Authority
JP
Japan
Prior art keywords
signal
carrier
luminance signal
converted
color signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP3219549A
Other languages
Japanese (ja)
Inventor
Toshihiro Funabashi
敏博 船橋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP3219549A priority Critical patent/JPH0564230A/en
Publication of JPH0564230A publication Critical patent/JPH0564230A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To obtain an inexpensive magnetic video recording and reproducing device with more accuracy by composing a comb line filter eliminating the remaining color signal components in a reproduced luminance signal and a comb line filter eliminating crosstalk components in a reproduced carrier color signal by utilizing two memories also at the time of reproduction. CONSTITUTION:Utilizing 1H delay memories 5, 6 composing a digital comb line filter for separating a color video signal to be recorded into a luminance signal and a carrier color signal at the time of recording, a comb line filter for eliminating the remaining color signal components in a reproduced luminance signal is composed of a 1H delay memory 5 and an adder 7 and a comb line filter for eliminating crosstalk in a reproduced carrier color signal is composed of a 1H memory 6 and a subtractor 9 at the time of reproducing.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、複合カラー映像信号を
輝度信号(Y)と搬送色信号(C)に分離して録画再生
する磁気録画再生装置に関するもので、特に輝度信号と
搬送色信号をそれぞれ低搬送波FM輝度信号と低域変換
色信号に変換し混合して順次記録するVTRに使用した
場合に、そのVTRの再生時の信号処理回路系に適した
機能を有するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording / reproducing apparatus for separating and recording a composite color video signal into a luminance signal (Y) and a carrier color signal (C), and more particularly to a luminance signal and a carrier color signal. When the VTRs are used in VTRs which are converted into low carrier FM luminance signals and low-frequency converted color signals, mixed, and sequentially recorded, they have a function suitable for a signal processing circuit system during reproduction of the VTRs.

【0002】[0002]

【従来の技術】近年、輝度信号と搬送色信号をそれぞれ
低搬送波FM輝度信号と低域変換色信号に変換し混合し
て順次記録するVTRにおいて、高画質化,高解像度化
のために複合カラー信号から輝度信号と搬送色信号を最
適に分離するY/C分離回路としてデジタルくし形フィ
ルタを使われ始めており、特に家庭用のVTRにおいて
は記録時だけではなく、再生時に復調輝度信号に含まれ
ている残留色信号成分を除去するためのフィルタ(以
下、Y/Cフィルタと呼ぶ)としても前記デジタルくし
形フィルタを利用することが多くなってきている。
2. Description of the Related Art In recent years, in a VTR that converts a luminance signal and a carrier color signal into a low carrier FM luminance signal and a low-frequency conversion color signal, mixes them, and sequentially records them, a composite color is used for high image quality and high resolution. Digital comb filters have begun to be used as a Y / C separation circuit that optimally separates a luminance signal and a carrier color signal from a signal. Especially in a VCR for home use, it is included in the demodulation luminance signal not only during recording but also during reproduction. As a filter for removing the residual color signal component (hereinafter referred to as Y / C filter), the digital comb filter is often used.

【0003】以下に従来の磁気録画再生装置について説
明する。図3は従来の磁気録画再生装置のデジタルくし
形フィルタの構成を示すものであり、図4は、従来の磁
気録画再生装置のVTRにデジタルくし形フィルタを使
用した場合のブロック図を示すものである。図3におい
て、1は映像信号入力端子であり、3は映像信号をデジ
タル値に変換するためのA/Dコンバータである。5と
6は1水平走査期間(1H)相当の遅延時間を有するメ
モリー(1Hメモリー)であり、10は論理演算回路で
ある。7は加算器であり、11は切換SWである。13
と14はデジタル値をアナログ信号に変換するD/Aコ
ンバータである。15,16は処理された映像信号を出
力するための映像信号出力端子である。図4において、
磁気録画再生装置のデジタルくし形フィルタ構成部分に
ついては、図3と同じ番号で示している。17は記録時
の映像信号入力端子である。18,19は記録時にR端
子側に、再生時にはP端子側にそれぞれ切り換えられる
切換SWである。21は輝度信号を低搬送波FM変調す
るFM変調器であり、22は搬送色信号を低域変換色信
号に変換する周波数変換器である。23は混合器であ
り、24,25は磁気ヘッドである。26は再生時に動
作する復調器であり、27は周波数変換器である。28
は、輝度信号出力端子であり、29は搬送色信号出力端
子である。30はクロストーク除去のくし形フィルタで
あり、31は遅延時間補償の遅延線である。
A conventional magnetic recording / reproducing apparatus will be described below. FIG. 3 shows a configuration of a digital comb filter of a conventional magnetic recording / reproducing apparatus, and FIG. 4 shows a block diagram when a digital comb filter is used for a VTR of the conventional magnetic recording / reproducing apparatus. is there. In FIG. 3, 1 is a video signal input terminal, and 3 is an A / D converter for converting a video signal into a digital value. Reference numerals 5 and 6 are memories (1H memories) having a delay time corresponding to one horizontal scanning period (1H), and 10 is a logical operation circuit. Reference numeral 7 is an adder, and 11 is a switching switch. Thirteen
And 14 are D / A converters for converting digital values into analog signals. Reference numerals 15 and 16 denote video signal output terminals for outputting the processed video signal. In FIG.
The components of the digital comb filter of the magnetic recording / playback apparatus are indicated by the same numbers as in FIG. Reference numeral 17 is a video signal input terminal for recording. Reference numerals 18 and 19 denote switching SWs that are switched to the R terminal side during recording and to the P terminal side during reproduction, respectively. Reference numeral 21 is an FM modulator that performs low carrier frequency FM modulation of the luminance signal, and 22 is a frequency converter that converts the carrier color signal into a low frequency conversion color signal. Reference numeral 23 is a mixer, and 24 and 25 are magnetic heads. Reference numeral 26 is a demodulator that operates during reproduction, and 27 is a frequency converter. 28
Is a luminance signal output terminal, and 29 is a carrier color signal output terminal. Reference numeral 30 is a comb filter for removing crosstalk, and 31 is a delay line for delay time compensation.

【0004】以上のように構成された磁気録画再生装置
について、図4のVTRでの使用例を基に以下その動作
について説明する。まず、VTRの記録時について説明
を行なう。映像信号入力端子17に入力された複合カラ
ー映像信号は切換SW18を通ってA/Dコンバータ3
に加えられデジタル値に変換される。変換されてデジタ
ル値となった前記複合カラー映像信号と前記複合カラー
映像信号を1Hメモリー5によって遅延した第一の遅延
複合カラー映像信号と、前記第一の遅延複合カラー映像
信号を1Hメモリー6によって遅延した第二の複合カラ
ー映像信号とを適切に切り換えくし形フィルタとして動
作する論理演算回路10により、デジタル値の輝度信号
と搬送色信号に分離される。分離された前記輝度信号は
切換SW11を介してD/Aコンバータ13に入力され
アナログ輝度信号に変換され、前記搬送色信号はD/A
コンバータ14に入力されてアナログ搬送色信号に変換
される。アナログ値に変換された前記輝度信号は、切換
SW19を通ってFM変調器21により、低搬送波FM
輝度信号に周波数変調される。またアナログ値に変換さ
れた搬送色信号は、周波数変換器22により、低域変換
色信号に周波数変換される。混合器23により前記低搬
送波FM輝度信号の低域周波数帯に前記低域変換色信号
を重畳し、磁気ヘッド24,25を介して磁気テープ上
に記録を行なう。
The operation of the magnetic recording / reproducing apparatus configured as described above will be described below based on an example of use in the VTR shown in FIG. First, description will be made on the recording of the VTR. The composite color video signal input to the video signal input terminal 17 passes through the switching SW 18 and the A / D converter
Is converted to a digital value. The composite color video signal converted into a digital value, the first delayed composite color video signal obtained by delaying the composite color video signal by the 1H memory 5, and the first delayed composite color video signal by the 1H memory 6 The delayed second composite color video signal is appropriately switched and is separated into a digital luminance signal and a carrier color signal by the logical operation circuit 10 which operates as a comb filter. The separated luminance signal is input to the D / A converter 13 via the switching SW 11 and converted into an analog luminance signal, and the carrier color signal is D / A.
It is input to the converter 14 and converted into an analog carrier color signal. The luminance signal converted into the analog value is passed through the switching SW 19 and is applied to the low carrier FM by the FM modulator 21.
The luminance signal is frequency-modulated. Further, the carrier color signal converted into the analog value is frequency-converted into the low frequency conversion color signal by the frequency converter 22. The mixer 23 superimposes the low-frequency conversion color signal on the low-frequency band of the low-carrier FM luminance signal, and records on the magnetic tape via the magnetic heads 24 and 25.

【0005】次にVTRの再生時について説明を行な
う。磁気ヘッド24,25によって磁気テープから再生
された低搬送波FM輝度信号はFM復調器26により元
の周波数帯の再生輝度信号に復調され、低域変換色信号
は周波数変換器27により元の周波数の再生搬送色信号
に変換される。前記再生輝度信号は前記切換SW18を
介して前記A/Dコンバータ3に入力されデジタル値の
再生輝度信号に変換される。前記デジタル値の再生輝度
信号と前記デジタル値の再生輝度信号を前記1Hメモリ
ー5によって遅延された遅延再生輝度信号を加算器7で
加算することにより、前記再生輝度信号に含まれている
残留色信号成分が除去される。前記残留色成分の除去さ
れた再生輝度信号は切換SW11を介して前記D/Aコ
ンバータ13によってアナログ値に変換されたのち前記
切換SW19を通って輝度信号出力端子28に出力され
る。一方前記再生搬送色信号はくし形フィルタ30によ
り磁気テープ上の隣接トラックからのクロストークが除
去されたのち、前記再生輝度信号との遅延時間差を補償
するために遅延線31を介して搬送色信号出力端子29
に出力される。
Next, the reproduction of the VTR will be described. The low carrier FM luminance signal reproduced from the magnetic tape by the magnetic heads 24 and 25 is demodulated by the FM demodulator 26 into the reproduced luminance signal in the original frequency band, and the low frequency conversion color signal is converted into the original frequency signal by the frequency converter 27. It is converted into a reproduction carrier color signal. The reproduction luminance signal is input to the A / D converter 3 via the switching SW 18 and converted into a reproduction luminance signal having a digital value. The reproduction luminance signal of the digital value and the reproduction luminance signal of the digital value are added by the adder 7 to the delayed reproduction luminance signal delayed by the 1H memory 5 to obtain a residual color signal included in the reproduction luminance signal. The component is removed. The reproduction luminance signal from which the residual color component has been removed is converted into an analog value by the D / A converter 13 via the switching SW11 and then output to the luminance signal output terminal 28 via the switching SW19. On the other hand, after the crosstalk from the adjacent tracks on the magnetic tape is removed by the comb filter 30 from the reproduced carrier color signal, the carrier color signal is output via the delay line 31 in order to compensate the delay time difference with the reproduced luminance signal. Terminal 29
Is output to.

【0006】[0006]

【発明が解決しようとする課題】しかしながら上記の従
来の構成のVTRにおいては再生時に復調輝度信号系に
のみ含まれている残留色信号成分を除去するためのデジ
タル信号処理が行なわれており、このデジタル信号処理
による大幅な時間遅れが前記復調輝度信号系のみに発生
し、搬送色信号とのタイミングずれが生じる。そのため
前記タイミングずれを補償するために数百ナノ秒から数
マイクロ秒の遅延素子31を別途前記搬送色信号系に追
加しなければならないという問題点を有していた。ま
た、くし形フィルタを構成できる1Hメモリー6とD/
Aコンバータ14が再生時には機能していない状態であ
りながら、別途クロストーク除去のためのくし形フィル
タ21が必要となるという問題点も有していた。
However, in the above-mentioned conventional VTR, the digital signal processing for removing the residual chrominance signal component included only in the demodulation luminance signal system is performed at the time of reproduction. A large time delay occurs due to the digital signal processing only in the demodulation luminance signal system, and a timing shift from the carrier color signal occurs. Therefore, there has been a problem that a delay element 31 of several hundred nanoseconds to several microseconds must be separately added to the carrier color signal system in order to compensate for the timing deviation. In addition, the 1H memory 6 and D / which can form a comb filter
Although the A converter 14 is not functioning at the time of reproduction, there is also a problem that the comb filter 21 for removing crosstalk is separately required.

【0007】本発明は上記従来の問題点を解決するもの
で、新たな遅延素子やくし形フィルタを追加することな
くVYRの再生時の信号処理系に使用できるデジタルく
し形フィルタを有した磁気録画再生装置を提供すること
を目的とする。
The present invention solves the above-mentioned conventional problems, and magnetic recording / reproduction having a digital comb filter that can be used in a signal processing system during VYR reproduction without adding a new delay element or a comb filter. The purpose is to provide a device.

【0008】[0008]

【課題を解決するための手段】この目的を達成するため
に本発明の磁気録画再生装置は、記録時には、記録すべ
き複合カラー映像信号をデジタル化した第一の映像信号
と、その第一の映像信号を第一のメモリーにより1水平
走査期間(1H)遅延した第二の映像信号と、その第二
の映像信号を第二のメモリーによりさらに1H遅延した
第三の映像信号とを作成し、その3つの映像信号を論理
演算回路により選択的に組み合わせて、デジタル化され
た輝度信号と搬送色信号を作成し、そのデジタル輝度信
号を第一のD/Aコンバータによりアナログ輝度信号に
変換した後、低搬送波FM変調し、前記デジタル搬送色
信号を第二のD/Aコンバータによりアナログ搬送色信
号に変換した後、低域に周波数変換し、前記低搬送波F
M変調輝度信号と低域変換搬送色信号とを混合して磁気
記録媒体上に記録し、再生時には、再生された低搬送波
FM変調輝度信号を復調して得られたアナログ輝度信号
をデジタル化した後、その再生デジタル輝度信号とその
再生デジタル輝度信号を前記第一と第二のメモリーの一
方により1H遅延した信号とを加算した信号を前記第一
と第二のD/Aコンバータの一方によりアナログ変換し
て再生アナログ輝度信号を得るとともに、再生された低
域変換色信号を元の周波数帯に変換したアナログ搬送色
信号をデジタル化した後、その再生デジタル搬送色信号
とその再生デジタル搬送色信号を前記第一と第二のメモ
リーの他方により1H遅延した信号とを減算し、その減
算信号を前記第一と第二のD/Aコンバータの他方によ
りアナログ変換して再生アナログ搬送色信号を得る機能
を備えた構成を有している。
In order to achieve this object, a magnetic recording / reproducing apparatus of the present invention, at the time of recording, a first video signal obtained by digitizing a composite color video signal to be recorded, and a first video signal thereof. A second video signal obtained by delaying the video signal by one horizontal scanning period (1H) by the first memory and a third video signal obtained by further delaying the second video signal by 1H by the second memory are created, After selectively combining the three video signals by a logical operation circuit to create a digitized luminance signal and carrier color signal, and after converting the digital luminance signal into an analog luminance signal by the first D / A converter , Low carrier wave FM modulation, and after converting the digital carrier color signal into an analog carrier color signal by a second D / A converter, frequency conversion into a low frequency band is performed to obtain the low carrier wave F.
The M-modulated luminance signal and the low-frequency conversion carrier color signal were mixed and recorded on a magnetic recording medium, and at the time of reproduction, the reproduced low-carrier FM-modulated luminance signal was demodulated to digitize an analog luminance signal. Then, a signal obtained by adding the reproduced digital luminance signal and the signal obtained by delaying the reproduced digital luminance signal by 1H by one of the first and second memories is analogized by one of the first and second D / A converters. After converting to obtain the reproduced analog luminance signal, the reproduced low-frequency converted color signal is converted to the original frequency band, and the analog carrier color signal is digitized, and then the reproduced digital carrier color signal and the reproduced digital carrier color signal Is subtracted from the signal delayed by 1H by the other of the first and second memories, and the subtracted signal is analog-converted by the other of the first and second D / A converters. It has a configuration having a function to obtain a reproduced analog carrier chrominance signal.

【0009】[0009]

【作用】この構成によって、輝度信号と搬送色信号をそ
れぞれ低搬送波FM輝度信号と低域変換色信号に変換し
混合して順次記録するVTRに使用した場合は、記録時
には複合カラー映像信号の3水平走査期間(H)のライ
ン相関性を検出して適切にくし形フィルタを切り換える
ことにより輝度信号と搬送色信号を最適に分離すること
ができ、また再生時には、復調輝度信号と搬送色信号を
別々のくし形フィルタに同時に介すことにより復調輝度
信号と搬送色信号間での遅延時間差を生じることなく復
調輝度信号に含まれている残留色信号成分を除去するこ
とができ、かつ再生搬送色信号の磁気記録媒体上の隣接
トラックからのクロストーク成分を除去することができ
る。
With this configuration, when the luminance signal and the carrier color signal are converted into the low carrier FM luminance signal and the low frequency band converted color signal, mixed and sequentially recorded, when used in the VTR, 3 of the composite color video signal is recorded at the time of recording. The luminance signal and the carrier color signal can be optimally separated by detecting the line correlation in the horizontal scanning period (H) and appropriately switching the comb filters, and the demodulated luminance signal and the carrier color signal can be separated during reproduction. It is possible to remove the residual chrominance signal component contained in the demodulated luminance signal without causing a delay time difference between the demodulated luminance signal and the carrier chrominance signal by simultaneously passing through the different comb filters, and the reproduced carrier color The crosstalk component of the signal from the adjacent track on the magnetic recording medium can be removed.

【0010】[0010]

【実施例】以下本発明の一実施例について、図面を参照
しながら説明する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

【0011】図1は磁気録画再生装置のデジタルくし形
フィルタの構成を示すものであり、図2は、磁気録画再
生装置のVTRにデジタルくし形フィルタを使用した場
合の実施例を示すものである。図3および図4に示す従
来例と同一構成のブロック図は同一符号を用いて示して
いる。従って図3および図4に示す構成と異なる点のみ
を説明する。2は映像信号入力端子、4はA/Dコンバ
ータである。8,12はそれぞれ記録時にはR端子側
に、再生時にはP端子側に切り換えられる切換SW、9
は減算器である。
FIG. 1 shows the structure of a digital comb filter of the magnetic recording / reproducing apparatus, and FIG. 2 shows an embodiment in which the digital comb filter is used for the VTR of the magnetic recording / reproducing apparatus. .. Block diagrams of the same configuration as the conventional example shown in FIGS. 3 and 4 are denoted by the same reference numerals. Therefore, only the points different from the configurations shown in FIGS. 3 and 4 will be described. Reference numeral 2 is a video signal input terminal, and 4 is an A / D converter. Switching switches 8 and 12 are switched to the R terminal side during recording and to the P terminal side during reproduction, respectively.
Is a subtractor.

【0012】以上のように構成された磁気録画再生装置
について、図2のVTRでの使用例を用いてその動作を
説明する。まず、VTRの記録時については切換SW
8,12を介する部分が異なってはいるが動作は従来例
と全く同じであるため、説明は省略する。VTRの再生
時は輝度信号の処理については従来例と同じであり、搬
送色信号の処理について大きく従来例と異なる点がある
ため、従来例と異なる点について説明を行なう。磁気ヘ
ッド24,25によって磁気テープから再生された低域
変換色信号は周波数変換器27により元の周波数の再生
搬送色信号に変換される。前記再生搬送色信号はA/D
コンバータ4に入力されデジタル値の再生搬送色信号に
変換される。前記デジタル値の再生搬送色信号と前記デ
ジタル値の再生搬送色信号を切換SW8を介して1Hメ
モリー6によって遅延された遅延再生搬送色信号を減算
器9で減算し、磁気テープ上の隣接トラック間のクロス
トーク除去を行なったのち、切換SW12を介してデジ
タル値からD/Aコンバータ14によってアナログ再生
搬送色信号に変換され、切換SW20を介して搬送色信
号出力端子29に出力される。なお実施例では、再生時
に、1Hメモリー5の出力を利用して再生輝度信号に含
まれている残留色信号成分を除去するくし形フィルタを
構成し、1Hメモリー6の出力を利用して再生搬送色信
号に含まれるクロストーク成分を除去するくし形フィル
タを構成する例を示したが、1Hメモリー5で再生搬送
色信号用のくし形フィルタを、1Hメモリー6で再生輝
度信号用のくし形フィルタを構成してもよい。
The operation of the magnetic recording / playback apparatus configured as described above will be described with reference to an example of use in the VTR shown in FIG. First, when recording VTR, switch SW
Although the parts passing through 8 and 12 are different, the operation is exactly the same as that of the conventional example, and therefore the explanation is omitted. During reproduction of the VTR, the processing of the luminance signal is the same as that of the conventional example, and the processing of the carrier color signal is largely different from the conventional example. Therefore, only the points different from the conventional example will be described. The low-frequency conversion color signal reproduced from the magnetic tape by the magnetic heads 24 and 25 is converted by the frequency converter 27 into the reproduction carrier color signal of the original frequency. The reproduction carrier color signal is A / D
It is input to the converter 4 and converted into a reproduction carrier color signal of a digital value. The digital reproduction reproduction color signal and the digital reproduction reproduction color signal are delayed by the 1H memory 6 via the switch SW8, and the delayed reproduction conveyance color signal is subtracted by the subtractor 9 so that the adjacent tracks on the magnetic tape are separated from each other. After the crosstalk is removed, the digital value is converted into an analog reproduction carrier color signal by the D / A converter 14 through the switch SW12 and output to the carrier color signal output terminal 29 through the switch SW20. In the embodiment, at the time of reproduction, the output of the 1H memory 5 is used to form a comb filter for removing the residual color signal component contained in the reproduction luminance signal, and the output of the 1H memory 6 is used for reproduction conveyance. An example of forming a comb filter for removing the crosstalk component contained in the chrominance signal has been shown. The comb filter for the reproduction carrier color signal in the 1H memory 5 and the comb filter for the reproduction luminance signal in the 1H memory 6 are shown. May be configured.

【0013】[0013]

【発明の効果】以上のように本発明によれば、輝度信号
と搬送色信号をそれぞれ低搬送波FM輝度信号と低域変
換色信号に変換し混合して順次記録する磁気録画再生装
置において、記録時には複合カラー信号の3水平走査期
間(H)のライン相関性を検出して適切にくし形フィル
タを切り換えることにより高解像度,高画質の輝度信号
と搬送色信号を得ることができ、また再生時には復調輝
度信号と搬送色信号を別々のくし形フィルタに同時に介
すことにより復調輝度信号と搬送色信号間での遅延時間
差を生じることがなくなり、新たにタイミング合わせの
ための遅延線を追加することなく復調輝度信号に含まれ
ている残留色信号成分を除去することができ、かつ再生
時の搬送色信号の磁気記録媒体上の隣接トラックからの
クロストーク成分を除去することができるため、従来、
搬送色信号のクロストーク成分除去のために設けられて
いたくし形フィルタを省くことができることにより、非
常に低コストでVTRの高画質化,高解像度化ができる
優れた磁気録画再生装置を実現することができるもので
ある。
As described above, according to the present invention, in a magnetic recording / reproducing apparatus for converting a luminance signal and a carrier chrominance signal into a low carrier FM luminance signal and a low frequency conversion chrominance signal, mixing and recording them sequentially, At times, it is possible to obtain a high-resolution and high-quality luminance signal and carrier color signal by detecting the line correlation in the three horizontal scanning periods (H) of the composite color signal and appropriately switching the comb filters. By simultaneously passing the demodulated luminance signal and the carrier color signal through different comb filters, there is no delay time difference between the demodulated luminance signal and the carrier color signal, and a new delay line for timing adjustment is added. The residual chrominance signal component contained in the demodulated luminance signal can be removed, and the crosstalk component of the carrier chrominance signal at the time of reproduction from the adjacent track on the magnetic recording medium. It is possible to remove, conventionally,
To realize an excellent magnetic recording / reproducing apparatus capable of improving the image quality and resolution of a VTR at a very low cost by eliminating the comb filter provided for removing the crosstalk component of the carrier color signal. Can be done.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の実施例における磁気録画再生装置のデ
ジタルくし形フィルタの構成図
FIG. 1 is a block diagram of a digital comb filter of a magnetic recording / reproducing apparatus according to an embodiment of the present invention.

【図2】本発明の実施例における磁気録画再生装置のブ
ロック図
FIG. 2 is a block diagram of a magnetic recording / reproducing apparatus according to an embodiment of the present invention.

【図3】従来の磁気録画再生装置のデジタルくし形フィ
ルタの構成図
FIG. 3 is a block diagram of a digital comb filter of a conventional magnetic recording / playback apparatus.

【図4】従来の磁気録画再生装置のブロック図FIG. 4 is a block diagram of a conventional magnetic recording / reproducing apparatus.

【符号の説明】[Explanation of symbols]

1 映像信号入力端子 2 映像信号入力端子 3 A/Dコンバータ 4 A/Dコンバータ 5 1Hメモリー 6 1Hメモリー 7 加算器 8 切換SW 9 減算器 10 論理演算回路 11 切換SW 12 切換SW 13 D/Aコンバータ 14 D/Aコンバータ 15 映像信号出力端子 16 映像信号出力端子 17 映像信号入力端子 18 切換SW 19 切換SW 20 切換SW 21 FM変調器 22 周波数変換器 23 混合器 24 磁気ヘッド 25 磁気ヘッド 26 FM復調器 27 周波数変換器 28 輝度信号出力端子 29 搬送色信号出力端子 30 くし形フィルタ 31 遅延線 1 Video Signal Input Terminal 2 Video Signal Input Terminal 3 A / D Converter 4 A / D Converter 5 1H Memory 6 1H Memory 7 Adder 8 Switching SW 9 Subtractor 10 Logical Operation Circuit 11 Switching SW 12 Switching SW 13 D / A Converter 14 D / A converter 15 Video signal output terminal 16 Video signal output terminal 17 Video signal input terminal 18 Switching SW 19 Switching SW 20 Switching SW 21 FM modulator 22 Frequency converter 23 Mixer 24 Magnetic head 25 Magnetic head 26 FM demodulator 27 Frequency Converter 28 Luminance Signal Output Terminal 29 Carrier Color Signal Output Terminal 30 Comb Filter 31 Delay Line

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】記録時には、記録すべき複合カラー映像信
号をデジタル化した第一の映像信号と、その第一の映像
信号を第一のメモリーにより1水平走査期間(1H)遅
延した第二の映像信号と、その第二の映像信号を第二の
メモリーによりさらに1H遅延した第三の映像信号とを
作成し、その3つの映像信号を論理演算回路により選択
的に組み合わせて、デジタル化された輝度信号と搬送色
信号を作成し、そのデジタル輝度信号を第一のD/Aコ
ンバータによりアナログ輝度信号に変換した後、低搬送
波FM変調し、前記デジタル搬送色信号を第二のD/A
コンバータによりアナログ搬送色信号に変換した後、低
域に周波数変換し、前記低搬送波FM変調輝度信号と低
域変換搬送色信号とを混合して磁気記録媒体上に記録
し、再生時には、再生された低搬送波FM変調輝度信号
を復調して得られたアナログ輝度信号をデジタル化した
後、その再生デジタル輝度信号とその再生デジタル輝度
信号を前記第一と第二のメモリーの一方により1H遅延
した信号とを加算した信号を前記第一と第二のD/Aコ
ンバータの一方によりアナログ変換して再生アナログ輝
度信号を得るとともに、再生された低域変換色信号を元
の周波数帯に変換したアナログ搬送色信号をデジタル化
した後、その再生デジタル搬送色信号とその再生デジタ
ル搬送色信号を前記第一と第二のメモリーの他方により
1H遅延した信号とを減算し、その減算信号を前記第一
と第二のD/Aコンバータの他方によりアナログ変換し
て再生アナログ搬送色信号を得ることを特徴とする磁気
録画再生装置。
1. At the time of recording, a first video signal obtained by digitizing a composite color video signal to be recorded and a second video signal obtained by delaying the first video signal by one horizontal scanning period (1H) by a first memory. A video signal and a third video signal obtained by further delaying the second video signal by 1H by the second memory are created, and the three video signals are selectively combined by a logical operation circuit and digitized. A luminance signal and a carrier color signal are created, the digital luminance signal is converted into an analog luminance signal by the first D / A converter, and then low carrier FM modulation is performed, and the digital carrier color signal is converted into the second D / A.
After being converted into an analog carrier color signal by a converter, the frequency is converted into a low frequency band, and the low carrier FM modulated luminance signal and the low frequency band converted carrier color signal are mixed and recorded on a magnetic recording medium. The analog luminance signal obtained by demodulating the low carrier FM modulated luminance signal is digitized, and the reproduced digital luminance signal and the reproduced digital luminance signal are delayed by 1H by one of the first and second memories. An analog carrier in which a signal obtained by adding and is analog-converted by one of the first and second D / A converters to obtain a reproduced analog luminance signal, and the reproduced low-frequency converted color signal is converted into the original frequency band. After digitizing the color signal, a reproduced digital carrier color signal and a signal obtained by delaying the reproduced digital carrier color signal by 1H by the other of the first and second memories. Subtraction, a magnetic recording and reproducing apparatus characterized by obtaining an analog conversion to reproduced analog carrier chrominance signal of the subtraction signal and the first by the other second D / A converter.
JP3219549A 1991-08-30 1991-08-30 Magnetic video recording and reproducing device Pending JPH0564230A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3219549A JPH0564230A (en) 1991-08-30 1991-08-30 Magnetic video recording and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3219549A JPH0564230A (en) 1991-08-30 1991-08-30 Magnetic video recording and reproducing device

Publications (1)

Publication Number Publication Date
JPH0564230A true JPH0564230A (en) 1993-03-12

Family

ID=16737246

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3219549A Pending JPH0564230A (en) 1991-08-30 1991-08-30 Magnetic video recording and reproducing device

Country Status (1)

Country Link
JP (1) JPH0564230A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100430700B1 (en) * 1995-07-07 2004-07-30 코닌클리케 필립스 일렉트로닉스 엔.브이. Circuit devices and video recorders for color signal processing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100430700B1 (en) * 1995-07-07 2004-07-30 코닌클리케 필립스 일렉트로닉스 엔.브이. Circuit devices and video recorders for color signal processing

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